Heavy metal pollutant

Heavy alloy pollutantAn ongoing debate regarding the subscribe definition for gruelling metal pollutant, there be many opposite definitions have been proposed. For example, some based on density, some on nuclear number or atomic weight, and some on chemical properties or toxicity. The commonly definition of cloggy metal is the element with a eminent (5.0) relative density and atomic weight. Kyung Ah Moon(2007) said thatheavy metals as metal or metallic materials and described them as metals which be toxic and accumulated in the human body Heavy metals normally materialisering in nature ar not prejudicial to our environment, because they ar only present in real small amounts. The heavy metals only become defilement when they show up in huge amounts due to industrialization. The word of taint is an emotive term, nub different things to differentpeople a reasonable general definition might be too much of something in the wrong place (Harrison, 1990). To many people, hea vy metal pollution is a problem associated with areas of intensive industry. However, roadways and automobiles now are considered to be one of the largest sources of heavy metals. The heavy metals causing pollution are mercury, arsenic, copper, barium, cadmium, chromium, lead, and zinc .Toxic heavy metals in air, s oil colour, and water supply are global problems that are a growing threat to the environment. The sources of heavy metal pollutants are metal mining, metal smelting, metallurgical industries, and other metal-using industries, wasteland disposal, corrosions of metals in use, agriculture and forestry, forestry, dodo fuel combustion, and sports and leisure activities. Heavy metal contamination affects large areas worldwide. thermal spots of heavy metal pollution are located tightfitting to industrial sites, around large cities and in the vicinity of mining and smelting plants. cultivation in these areas faces major problems due to heavy metal transfer into crops and subsequently into the food chain.About half of the zinc and copper contri only whenion to the environment from urbanisation is from automobiles. For example, Brakes release copper, while tire wear releases zinc. Motor oil also tends to accumulate metals as it comes into contact with surrounding parts as the engine runs, so oil leaks become another pathway by which metals enter the environment. we know what is heavy metal pollution and the sources of it ,but what is the effect of it for our body.Generally, globe are exposed to these metals byingestion (drinking or eating) or inhalation (breathing).Working in or living skillful an industrial site which utilizesthese metals and their compounds increases ones riskof scene, as does living near a site where these metalshave been improperly disposed.Heavy metals are dangerous because they tend to bioaccumulate in food chain. Lszl (2008)said that Bioaccumulation means an increase in the assimilation of a chemical in a biological organis m over time, compared to the chemicals concentration in the environment. Compounds accumulate in living things any time they are taken up and stored faster than they are broken down (metabolized) or excreted. Now we are going to describe the kinds of heavy metals, their dangerous levels and the do of these heavy metals to human health and environment. The heavy metals such asLead, Cadmium, Copper, chromium, Selenium and Mercuryare actually pollutants. Lead in military personnel, Long term exposure give the sack occur acute or chronic damage to the nervous system on humans. Cadmium in humans, long-term exposure is associated with renal disfunction. High exposure can lead to obstructive lung disease and has been linked to lung cancer, and damage to humans respiratory systems. Copper is an essential substance to human life, but in high school doses it can cause anemia, liver and kidney damage, and stomach and intestinal irritation. rear of the Mercury is to cause damage to the br ain and the central nervous system. Chromium (VI) compounds are toxins and known human carcinogens, whereas Chromium (III) is an essential nutrient. Breathing high levels can cause irritation to the lining of the nose nose ulcers runny nose and breathing problems, such as asthma, cough, shortness of breath, or wheezing. pare contact can cause skin ulcers. Allergic reactions consisting of severe inflammation and swelling of the skin have been noted. Long term exposure can cause damage to liver, kidney circulatory and nerve tissues (Martin,2009), so heavy metal cause extremely effect for human, but what about environment. Heavy metals whitethorn be used to extract gold and other raw materials from the earth, but its left behind an extremely destruction. Bilal (2006) writs that Soil and water are considered a last resort for most of the chemicals produced by the rights.heavy In natural pollution of environments, this pollution created through the dissolution of heavy metals with wat er during the natural round of golf of water through the joggles or through the taint containing quantities of these metals such as mercury, lead, zinc, nickel, cadmium, chromium, copper, iron and others. This phenomenon exists in many countries, contamination may occur naturally in the ground because of the interactions of metals with sulfur oxidizing substances can activate such interactions the front end of nitrates that can come from many sources(Omadar,2009).Artificial pollution may occur pollution in streams that come from the mines of these tables contain heavy metals and high concentrations of these metals in bout can be grouped in the structure of exposed rock due to direct contact with oxygen in such a phenomenon found in the eastern provinces of Germany, where in the work of extracting minerals , and types of industrial pollution, mineral processing and manufacture of the final, produces large quantities of industrial wastes that contain many types of harmful metals such as chromium, mercury, lead, nickel, cadmium .. Etc.. These wastes discharged into the open water or drainage systems without careful elimination and therefore the move waste into rivers and lakes are the primary sources of drinking water, and in many cases heavy metal percolate the soil to the water basins due to the illegal discharge of contaminated water into the ground. Sources of pollution, heavy elements are multiple and vary depending on the type of heavy metal and raw materials but most of these sources are industrial waste or transfer of these elements of air into the water by dissolution in rainwater. The risk of contamination of heavy metal elements For the risks related to animals living in the aquatic environment, these heavy metals accumulate in their bodies and may lead to expiration in the event of a high concentration of heavy pollutants. period the health risks related to people up to him through the transition metals to tip and plants and then to humans t hrough food, accumulate in the human body, causing serious illnesses by type of metal. There are risks associated with aquatic plants and soil planted with these plants that are irrigated with polluted water